Finisar AN-2030 specifications Scope and Overview, 35 2. Applicable Documents

	AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers	F i n i s a r
1	Application Note AN-2030
2
3	Digital Diagnostic Monitoring Interface
4	for SFP Optical Transceivers

5

61. Scope and Overview

7

8This document defines an enhanced digital diagnostic monitoring interface available in

9Finisar SFP and GBIC optical transceivers. The i nterface allows real time access to

10device operating parameters, and it includes a sophisticated system of alarm and

11warning flags which alerts end-users when particular operating parameters are outside

12of a factory set normal range. The interface is fully compliant with SFF-8472, “Digital

13Diagnostic Monitoring Interface for Optical Transceivers", revision 9.3.

14

15These digital diagnostic features are implemented in all Finisar SFP transceivers that

16contain a “D” in the part number suffix (for example, FTRJ -1319-7D-2.5), as well as

17DWDM and CWDM GBICs. All next generation Finisar SFPs utilizing the new part

18numbering scheme (e.g. FTRJ1621P1BCL) also have the same diagnostic capability.

19

20The interface is an extension of the serial ID interface defined in the GBIC specification

21as well as the SFP MSA. Both specifications define a 256-byte memory map in

22EEPROM, which is accessible over a 2-wire serial interface at the 8 bit address

231010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit

24address 1010001X (A2h), so the originally defined serial ID memory map remains

25unchanged. The interface is identical to, and is thus fully backward compatible with both

26the GBIC Specification and the SFP Multi Source Agreement. The complete interface is

27described in Section 3 below.

28

29The operating and diagnostics information is monitored and reported by a Digital

30Diagnostics Transceiver Controller (DDTC), which is accessed via a 2-wire serial bus.

31Its physical characteristics are defined in Section 4.

32

33

34

352. Applicable Documents

36

37Gigabit Interface Converter (GBIC). SFF document number: SFF-0053, rev. 5.5,

38	September 27, 2000.
39

40Small Form Factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA),

41	September 14, 2000.
42

43Digital Diagnostic Monitoring Interface for Optical Transceivers: SFF-8472, Draft

44	Revision 9.3, August 1, 2002.
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46
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	9/26/02 Revision D	Page 1